Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations only supply destructiveHint=true, and the description meaningfully enriches that by clarifying the operation is a reversible soft-remove returning HTTP 204 with no body, and by disclosing the email-to-MD5-hash conversion. It does not cover auth/permission requirements or rate-limit behavior, so it falls short of exhaustive.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Two tight sentences with the key distinction (soft vs. permanent) front-loaded, followed by the endpoint and return code. Every clause carries information; nothing is padded.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no output schema, the description compensates by stating the HTTP 204/no-body return, and it covers the required list_id plus the email/subscriberHash alternatives already in the schema. An agent has everything needed to invoke this mutation correctly.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so all three parameters are already documented in the schema, including the MD5-hash note the description repeats. The description adds no parameter syntax or precedence detail (e.g., email vs. subscriberHash) beyond the schema baseline.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource ('Archive (soft-remove) an audience member') and explicitly disambiguates from the permanent-delete action, plus names the underlying REST endpoint. An agent can distinguish this from add/update/get member siblings immediately.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The 'this is NOT the permanent-delete action' clause gives a clear negative criterion and the term 'reversible' implies when this is preferable to a hard delete. However, no guidance is given on when to archive vs. update or remove tags relative to the other member siblings in the toolset.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.